Description- Leupold® mounts are every bit as rugged and dependable as the Leupold optics they’re intended to secure. With a huge variety of mounting systems, for nearly every type of firearm under the sun, you’re sure to find the perfect match for you firearm, and your style of shooting. - Permanent Cross-Slot Stability. - Steel rings that are based on the proven cross-slot design. - Uses the Leupold® QRW™ bases or any other Picatinny-style mounting rails.